Season the chicken breast with half of the sea salt and black pepper.
Heat a grill pan or skillet over medium-high heat and cook the chicken for 6-7 minutes per side until the internal temperature reaches 165°F. Set aside to rest.
In a small dry skillet over medium heat, toast the sliced almonds for 2-3 minutes until golden and fragrant, then remove from heat immediately.
In a small saucepan, heat the olive oil over medium heat. Add the diced onion and minced garlic, sautéing for 2 minutes until translucent.
Add the dry basmati rice to the saucepan and stir for 1 minute to lightly toast the grains.
Pour in the chicken broth and the remaining salt and pepper. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until liquid is absorbed.
Remove the rice from heat and let it sit covered for 5 minutes. Fluff with a fork.
Stir the lemon zest, lemon juice, and chopped fresh parsley into the rice pilaf.
Slice the rested chicken and serve it over the rice, garnishing the entire plate with the toasted almonds.